package javase1.day10.demo07;

public class Computer {
    public void powerOn(){
        System.out.println("打开电脑");
    }
    public void powerOff(){
        System.out.println("关闭电脑");
    }
    public void useDevise(Usb usb){
        usb.openDivce();
        if(usb instanceof Mouse){
            Mouse mouse=(Mouse)usb;
            mouse.click();

        }else if(usb instanceof Keyboard){
            Keyboard keyboard=(Keyboard)usb;
            keyboard.input();
        }
        usb.closeDivce();
    }
}
